/**
* Shutdown is not supported by Quark, so do the closest possible here:
* Halt ARC and put the platform in deep sleep.
* NOTE: all wake source will be able to reboot the source unless previously
* masked.
*/
void soc_shutdown(void)
{
/* Halt ARC */
SCSS_REG_VAL(SCSS_SS_CFG) |= ARC_HALT_REQ_A;
/* Enable deep sleep */
SCSS_REG_VAL(PM1C_BASE) |= PM1C_SLPEN;
/* Deep sleep is not reached immediately, loop in halt mode
* while waiting. */
while (1)
__asm__("hlt");
/* We never reach here */
}
/* This function is also called at deep sleep resume. */
int _arc_init(struct device *arg)
{
u32_t *reset_vector;
ARG_UNUSED(arg);
if (!SCSS_REG_VAL(SCSS_SS_STS)) {
/* ARC shouldn't already be running! */
printk("ARC core already running!");
return -EIO;
}
/* Address of ARC side __reset stored in the first 4 bytes of arc.bin,
* we read the value and stick it in shared_mem->arc_start which is
* the beginning of the address space at 0xA8000000 */
reset_vector = (u32_t *)RESET_VECTOR;
SYS_LOG_DBG("Reset vector address: %x", *reset_vector);
shared_data->arc_start = *reset_vector;
shared_data->flags = 0;
if (!shared_data->arc_start) {
/* Reset vector points to NULL => skip ARC init. */
SYS_LOG_DBG("Reset vector is NULL, skipping ARC init.");
goto skip_arc_init;
}
#ifndef CONFIG_ARC_GDB_ENABLE
/* Start the CPU */
SCSS_REG_VAL(SCSS_SS_CFG) |= ARC_RUN_REQ_A;
#endif
SYS_LOG_DBG("Waiting for arc to start...");
/* Block until the ARC core actually starts up */
while (SCSS_REG_VAL(SCSS_SS_STS) & 0x4000) {
}
/* Block until ARC's quark_se_init() sets a flag indicating it is ready,
* if we get stuck here ARC has run but has exploded very early */
SYS_LOG_DBG("Waiting for arc to init...");
while (!(shared_data->flags & ARC_READY)) {
}
skip_arc_init:
return 0;
}
void platform_usb_init(void)
{
/* platform specific init of USB core */
MMIO_REG_VAL(QRK_PMUX_SLEW_RATE_0) = PIN_MUX_SLEW_4mA_driver;
MMIO_REG_VAL(QRK_PMUX_SLEW_RATE_1) = PIN_MUX_SLEW_4mA_driver;
MMIO_REG_VAL(QRK_PMUX_SLEW_RATE_2) = PIN_MUX_SLEW_4mA_driver;
MMIO_REG_VAL(QRK_PMUX_SLEW_RATE_3) = PIN_MUX_SLEW_4mA_driver;
enable_usb();
/* Init the USB driver */
SCSS_REG_VAL(SCSS_INT_USB_MASK_OFFSET) = QRK_INT_USB_UNMASK_QRK;
}
void soc_reboot(void)
{
SCSS_REG_VAL(SCSS_RSTC) = RSTC_WARM_RESET;
}
